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Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film

A technology of light-shielding and binder resins, which is applied in the field of light-shielding sliding parts, resin compositions for light-shielding sliding films, and light-shielding sliding films. It can solve the problems of easy falling off of particles, increase design freedom, and improve dispersion excellent properties, film strength and abrasion resistance

Active Publication Date: 2019-07-30
KIMOTO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since they contain coarse and hard particles such as silica, there is a problem that the particles are easy to fall off when sliding.

Method used

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  • Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film
  • Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film
  • Light-shielding sliding film, light-shielding sliding member, and resin composition for light-shielding sliding film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0072] Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to these Examples at all. The present invention can adopt various conditions within the scope not departing from the gist of the present invention and achieving the object of the present invention. In addition, below, unless there is a description in particular, "part" means a "mass part".

[0073] [Preparation of resin composition (coating liquid)]

preparation example 1

[0075] The resin composition (solid content concentration: 29.8 mass %) of the compounding composition shown below was prepared.

[0076] ・73.6 parts by mass of urethane-based binder resin (NCO / OH ratio: 1.23)

[0077] Acrylic polyol component

[0078] (ACRYDIC A804: manufactured by DIC Corporation, OH value: 40, solid content: 50% by mass)

[0079] Polyisocyanate Curing Agent Components

[0080] (TAKENATE D110N: manufactured by Mitsui Chemicals, NCO value: 11.5, solid content: 75% by mass)

[0081] 13.2 parts by mass of carbon black

[0082] (VULCAN XC-72R: manufactured by Cabot Corporation, average primary particle size: 30nm, aggregate particle size: 0.4μm)

[0083] 13.2 parts by mass of granular wax

[0084] (Ceridust 3620: manufactured by Clariant Chemicals, average particle diameter D 50 : 7.5~9.5μm)

[0085] ·Leveling agent 0.2 parts by mass

[0086] (Silicone-based additive M-ADDITIVE: manufactured by Tosoh Dow Corning Corporation)

[0087] · Diluting solvent ...

preparation example 2

[0090] The resin composition (solid content concentration: 29.8 mass %) of the compounding composition shown below was prepared.

[0091] · Urethane-based binder resin (NCO / OH ratio: 1.30) 73.6 parts by mass

[0092] Acrylic polyol component

[0093] (ACRYDIC A804: manufactured by DIC Corporation, OH value: 40, solid content: 50% by mass)

[0094] Polyisocyanate Curing Agent Components

[0095] (TAKENATE D110N: manufactured by Mitsui Chemicals, NCO value: 11.5, solid content: 75% by mass)

[0096] 13.2 parts by mass of carbon black

[0097] (VULCAN XC-72R: manufactured by Cabot Corporation, average primary particle size: 30nm, aggregate particle size: 0.4μm)

[0098] 13.2 parts by mass of granular wax

[0099] (Ceridust 3620: manufactured by Clariant Chemicals, average particle diameter D 50 : 7.5~9.5μm)

[0100] ·Leveling agent 0.2 parts by mass

[0101] (Silicone-based additive M-ADDITIVE: manufactured by Tosoh Dow Corning Corporation)

[0102] · Diluting solvent

...

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Abstract

Provided are a light-shielding sliding film, a light-shielding sliding member, and the like having excellent coating film strength and abrasion resistance. A light-shielding sliding film 21 containingat least: a urethane-based binder resin which is a cured material of a polyol and a polyisocyanate curing agent, the blending ratio of the polyol and the polyisocyanate curing agent being 1:1.21-1.40in terms of the ratio of NCO groups of the polyisocyanate curing agent and OH groups of the polyol; carbon black; and a particulate wax is provided on one or more surfaces 11a, 11b of a substrate 11.Preferably, the light-shielding sliding film 21 essentially does not contain an inorganic filler having an average particle diameter D50 of 3.0 [mu]m or greater and / or resin beads having an average particle diameter D50 of 3.0 [mu]m or greater.

Description

technical field [0001] The present invention relates to a light-shielding sliding film, a light-shielding sliding member, and a resin composition for a light-shielding sliding film. Background technique [0002] Shutters and aperture members of various optical devices such as single-lens reflex cameras, compact cameras, and video cameras use light-shielding members from the viewpoint of preventing vignetting, ghosting, and the like due to external light. Furthermore, these light-shielding members are also required to have excellent gliding properties (slidability) and low gloss in terms of their usage. [0003] Conventionally, as shutters, aperture members, etc. of various optical devices, materials obtained by coating black paint on metal thin films have been used. However, in recent years, research has been conducted on its replacement with lightweight plastic materials. [0004] As such a non-metallic light-shielding member, the present applicant has proposed a light-sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00B32B27/20B32B27/40C08G18/10C08J7/04C08K3/04C08L23/26C08L75/04C08L91/06G02B1/04G03B9/02G03B9/10G03B9/36C08J7/043C08J7/046
CPCB32B27/20B32B27/40C08G18/10C08K3/04C08L23/26C08L75/04C08L91/06G02B1/04G02B5/00G03B9/02G03B9/10G03B9/36C08J7/043C08J7/046C08J7/04
Inventor 长滨豪士
Owner KIMOTO CO LTD
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